NEX-19401 update copyright year to 2019
Reviewed by: Rick McNeal <rick.mcneal@nexenta.com>
Reviewed by: Joyce McIntosh <joyce.mcintosh@nexenta.com>

@@ -7,7 +7,7 @@
 .\" A full copy of the text of the CDDL should have accompanied this
 .\" source.  A copy of the CDDL is also available via the Internet at
 .\" http://www.illumos.org/license/CDDL.
 .\"
 .\"
-.\" Copyright 2018 <contributor>
+.\" Copyright 2019 Nexenta Systems, Inc.
 .\"